HydroBot Arm Kit
Powerful hydraulics controlled robot gripper arm
Screenshots
Hunter's comment

Children aged 12 and over will be thrilled with the HydroBot Arm Kit because it works without batteries and with hydraulic systems. Even the finest tasks can be performed precisely by the multi-axis gripper arm. The assembly and operation is easily explained by graphic instructions.
Use all 6 axis to control your Robotic Arm. The gripper can open and close with a maximum 47 mm (1.89 in.) gap, wrist joint rotation of 180 degrees, wrist joint mobility of 98 degrees, elbow joint range of 44 degrees, base rotation of 270 degrees, and shoulder joint motion of 45 degrees. With a vertical reach of 16.35 inches, horizontal reach of 12.42 inches.
Link
https://www.elenco.com/product/hydrobot-arm-kit/
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